Forged journal-bearing wedge and process of making same



1929- F. K. HABENICHT ET AL 1,726,180

FORGED JOURNAL BEARING WEDGE AND PROCESS OF MAKING SAME Filed May 25, 1928 4 Fig.1.

Inventors F. K. HabeniCht F. H. Pietzsch Atty;

Patented Aug. 27, 1929.

UNITED STATES PATENT OFFICE.

FREDERICK K. HABENIGI-IT AND FRANK H. PIETZSGH, OF ST. LOUIS, MISSOURI, AS- SIGNORS TO RAILWAY DEVICES COMPANY, OF ST. LOUIS, MISSOURI, A CORPORA- TION OF MISSOURI.

FORGED JOURNAL-BEARING HEDGE AND PROCESS OF MAKING SAME.

Application filed May 25,

It is desirable that wedges for railway journal bearings have flat side bearings extending substantially from the top to the bottom of the wedge to effectively prevent the tilting of the wedge under tortional strain imparted from the axle to the brass and its cooperating wedge particularly when the car is started'or stopped. Such extended flat side bearings may be readily produced on cast wedges but in drop forged wedges, as heretofore produced, only a flat flash line of about one quarter inch in width is produced, the remainder of the side bear ing tapering toward the top and bottom of the wedge in order to provide the necessary draft to prevent the wedge from adhering to the forging dies. It is of course possible to provide such drop forged wedges with extended side bearings by machining or grinding operations but this so increases the cost that they cannot be sold in competition with cast wedges.

It is the object of our invention to pro duce a drop forged wedge with extended flat side bearings without resorting to supplementary machining or grinding operations.

In the accompanying drawings, which illustrate a wedge made in accordance with our invention, Figure 1 is a perspective View of the wedge before the flash is trimmed; Figure 2 is a perspective View of the completed wedge; and Figure 3 is a View illustrating the manner of forming the flat side bearings by trimming.

The wedge 5 as shown in the drawings is in general conformation of the usual M. C. B. type and is interchangeable therewith. It is drop forged, a flash 6 being formed at the meeting line of the forging dies. Each of the side bearings consists of an upper 1928. Serial No. 280,514.

.line 6 the parts 7 and 8 are also trimmed,

as shown in dotted lines in Figure 3, so that a flat side bearing 7, 8 is produced extending from the top to the bottom of I the wedge. The result we are enabled to accomplish by reason of the offset arrangement of the parts 7 and '8, for we have found that While the entire thickness of the metal of the wedge offers more resistance than can be overcome by the trimming die, one-half the thickness can be successfully severed and with the ofiset arrangement of the parts 7 and 8 this is all the metal under shearing strain at any one time during the operation of trimming.

It will be seen that by our method we produce a forged wedge having flat side bearings extending from the top to the bottom of the wedge without any increase in cost of production over the ordinary drop forged wedges having inclined side bearings.

Having fully described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

The method of forming journal bearing wedges which comprises forging the wedge with a flash and with a side projection, and

simultaneously trimming said flash and pro jection to form a fiat side bearing extending in a vertical direction from the flash line.

In testimony whereof, we hereunto afiix our signatures, this 23rd day of May, 1928.

FREDERICK K. HABENICHT. FRANK H. PIETZSCH. 

